Select the passive form of the given sentence.
People claim to have seen the wild and mad elephant in several cities.

A

The wild and mad elephant has been claimed to be seen by the people in several cities.

B

The wild and mad elephant is being claimed to be seen in several cities.

C

The wild and mad elephant is claimed to have been seen in several cities.

D

The wild and mad elephant was claimed to be seen by people in several cities.